[FFmpeg-devel] soundtouch filter?
pkoshevoy at gmail.com
Wed May 30 06:49:02 CEST 2012
On 05/15/2012 10:13 AM, Michael Niedermayer wrote:
> On Tue, May 15, 2012 at 12:30:32AM -0600, Pavel Koshevoy wrote:
>> On 4/29/12 2:56 PM, Pavel Koshevoy wrote:
>> The filter files are here:
>> So, is it worth trying to wrap it as an avfilter and add it to ffmpeg?
> sure it would be very welcome but keep in mind ffmpeg is C not C++
Understood. I began porting my code to C today.
I have some concerns regarding timestamps. In my opinion this filter should not
change the timestamps. In my player I added an extra field to the decoded frame
for tempo value. This way the audio/video renderers still sync according to the
decoded PTS, and can adjust the frame duration and sleep according to current
frame tempo. I don't see any other easy way of preserving a/v sync while
allowing the user to tweak tempo continuously during playback.
This brings me to my next point. Is AVFilter::process_command the appropriate
interface for updating the tempo parameter during playback?
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